Improvement in car-wheel molds



UNITED STATES PATENT OFFICE.,

WILLIAM ELLISON WORTH, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN CAR-WHEEL MOLDS.

Specification forming part of Letters Patent No. l 10,717, dated January3, 1871'.

To @ZZ whom, it may concern:

Be it known that I, WILLIAM ELLIsoN WORTH, of San Francisco, in thecounty of San Francisco and State of California, have invented a new anduseful Improvement in Car-Vheel Molds; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same7 referencebeing had to the accompanying drawing, forming part of this speeication.

This invention relates to improvements in rotary molds or flasks forutilizing the effect of centrifugal force to dispose the metal incasting car-wheels.

It consists in making the nowel of a perforated disk of metal, and aring fitted to it on which the chill-ring rests, and the cope of a topplate and ring, all fitted together and to a disk on the top of a rotaryshaft, for clamping together and to the disk, and the top and bottomplates are provided with ventilators, all

` as hereinafter more fully specied.

The drawing represents a sectional elevation of my improved rotarymold.`

A is the bottom plate of the nowel, and B the ring thereof. The plate Ais provided with vent-holes for the escape of the gas from the greensand with which it is to be lled, and in which the mold for the insideof the wheel is to be made. It has an annular rabbet at the inner side,forming a projection, which sits down inside a vertical flange, E, onthe upper side of the disk F, placed on the top of the. shaft G, bywhich the mold is to be rotated. The said flange is higher than thedepth of the rabbet, and supports the plate A above the surface of plateF enough to make a Ventilating space for the gases passing through theholes in plate Ato escape through, the ventilator H having a large mouthadj usted in relation to the direction of rotation of the plate to causean active escape of the gas. The ring B of the nowel has an annularrecess at the top7 receiving the projection Iof the chill K, which hasan annular recess, L, at the inside of the top for the reception of thering Mof the cope, the top plate of which, N, has a iiange, O,projecting down at the outside of it, the whole being thus connectedtogether, so that when clamped onto the plate F- by the clamps P andtightening-screws, there can be no danger of the misplacement of anypart when turning at the high velocity required to act on the metalproperly. The sand-mold is made in the cope for the outer face of thewheel, cross-bars being placed in it against the plate N, to provideescape-passages for the gas to ventilator R, and a hole being made atthe center coinciding with the hole S in the plate for pouring in themetal. A rim, F, is raised around the said hole to prevent the overflowof the metal.

The shaft G may be provided with any suitable arrangement of gears forrotating it.

rIlhe face U of the chill forms the thread of the wheel, and the curvedplace V the flange. Having thus described my invention, I claim as newand desire to secure by Letters Patent- The improved rotary rnold orflask for carv.

wheels, consisting of the upper and lower disks, N F, and rings M B,constructed and arranged substantially as specified.

WILLIAM ELLISON WORTH..

Vtnesses:

H. LEHNIIAEDT, O. B. OAKLEY.

